Endless Cockroaches, Deathrender, and Phyrexian Altar

Prerequisites

• Endless Cockroaches on the battlefield
• Deathrender on the battlefield
• Phyrexian Altar on the battlefield
• Deathrender attached to Endless Cockroaches

Steps

1. Activate Phyrexian Altar by sacrificing Endless Cockroaches, adidng one mana of any color
2. Endless Cockroaches dies, triggering itself and Deathrender
3. Resolve the Endless Cockroaches trigger, returning it from your graveyard to your hand
4. Resolve the Deathrender trigger, putting Endless Cockroaches onto the battlefield from your hand, and attaching Deathrender to it
5. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers